Definition

/tʃeɪndʒ/

noun

The process of becoming different.
“The product is undergoing a change in order to improve it.”
Small denominations of money given in exchange for a larger denomination.
“Can I get change for this $100 bill please?”
A replacement, e.g. a change of clothes
Balance of money returned from the sum paid after deducting the price of a purchase.
“A customer who pays with a 10-pound note for a £9 item receives one pound in change.”
Usually coins (as opposed to paper money), but sometimes inclusive of paper money
“Do you have any change on you? I need to make a phone call.”

verb

To become something different.
“The tadpole changed into a frog. Stock prices are constantly changing.”
To make something into something else.
“The fairy changed the frog into a prince. I had to change the wording of the ad so it would fit.”
To replace.
“Ask the janitor to come and change the lightbulb. After a brisk walk, I washed up and changed my shirt.”
To replace one's clothing.
“You can't go into the dressing room while she's changing. The clowns changed into their costumes before the circus started.”
To replace the clothing of (the one wearing it).
“It's your turn to change the baby.”